≡ Menu

Mac OS X

Bash Clear DNS Cache

How do I clear DNS cache using BASH shell prompt under UNIX like operating systems?
[click to continue…]

Linux X11 Connection Rejected Because of Wrong Authentication Error and Solution

Q. I’m trying to login to my remote Ubuntu Linux server from Mac OS X desktop using following command:
ssh -X user@vpn.officeserver.example.com xeyes

But I’m getting an error that read as follows:

X11 connection rejected because of wrong authentication.

How do I fix this error?
[click to continue…]

Thunderbird Move Mail / Settings From Desktop Computer To Laptop

Q. How do I move my Thunderbird email client settings from Debian Linux desktop to a new Ubuntu Linux laptop? I’ve installed Thunderbird on Ubuntu Linux but not able to find any import or export option. How do I move settings?
[click to continue…]

Can I Run Pidgin on Mac OS X?

Q. Can I install and run Pidgin instant messaging client under Mac OS X operating system?
[click to continue…]

Linux Mount Solaris x86 UNIX UFS Partitions

Q. How do I mount Solaris 10 / OpenSolaris x86 parition under Linux to access file system?
[click to continue…]

Free DNS Server Software

Can you tell me the name of free dns server software for my Linux server system?
[click to continue…]

Free DNS Server

Q. My ISP DNS servers are overloaded, can you give me free dns server IP address for fast name resolution?
[click to continue…]

How To Tell If Your Linux Server Uses xinetd OR inetd sever

Q. How to tell if my Linux server is using xinetd or inetd service?
[click to continue…]

Linux sudo Configuration

Q. Can you tell me how to configure sudo to provide access to end users? How do I allow to run programs with the security privileges of another user using sudo?
[click to continue…]

Mac OS X Remove SSH Known Host

I‘ve reinstalled Linux on remote server and now trying to connect it over ssh using Mac OS X:
ssh user@server1.example.com

But I’m getting an error which read as follows:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
5c:9b:16:56:a6:cd:11:10:3a:cd:1b:a2:91:cd:e5:1c.
Please contact your system administrator.
Add correct host key in /Users/user/.ssh/known_hosts to get rid of this message.
Offending key in /Users/user/.ssh/known_hosts:1
RSA host key for server1.example.com has changed and you have requested strict checking.
Host key verification failed.

How do I fix this problem under Mac OX X?
[click to continue…]